Wetness Indicator

A Wetness Indicator is a common feature in many disposable toilet training pants. It is a feature that reacts to exposure of liquid as a way to discourage the wearer to urinate in the training pant.
Types
Fade when wet
This is a feature in most training pants that has small graphics which fade as a reaction to liquid, specifically urine. The intent for this feature is to be an incentive for those who use the toilet to urinate and to discourage wetting the training pant.
Feel wet
This is a feature used in some training pants that lets the wearer know when she is wet by feeling. Nowadays few training pants use this, likely because of how they are criticized for causing rashes, or not working at all.
History
In 2000, Huggies introduced and started integrating their new Learning Designs feature into all Pull-Ups Training Pants. These were small designs on the Pull-Up that use a special ink that fades when exposed to wetness, with an intent to let the wearer know when the wearer is wet or dry and as an incentive for urinating in the toilet instead of in the Pull-Up.
In 2002, Pampers introduced Easy Ups trainers, which adopted the Learning Designs technique from Huggies Pull-Ups.
In 2003, Pampers introduced Feel 'N Learn trainers, which not only used the Learning Designs, but also added a wetness liner that lets the wearer know when she is wet by feeling.
In 2005, Huggies copied Pampers's Feel 'N Learn trainers by releasing Pull-Ups Training Pants with Wetness Liner.
See Also
*Training Pants
*Huggies Pull-Ups

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